Calipers



Jul 2s,'1925'..,

- J. C. WILLIAMSON GALIPERS Filed July 24, 1924 2 Sheets-Sheet 1 Patented July 28, 1925.

cameo STATES PATENT Fries.

JAMES C. WILLIAMSON, OF COBDELE, GEORGIA.

GALIPERS.

Application filed .nu 'za, 1924. Serial No. 727,926.

To all whom ir/may concern Be it known that I, JAMES C. TILLIAMSON,

a citizen of the United States, residing at This invention relates to calipers or the like. and aims .to providenovel means employed in connection with the caliper and forming apart thereof for registering the distance between the free ends of the leg members thereof. 7

An important object of the invention is the provision of means whereby the dial forming a part of the caliper will be held against movement when the leg members are moved towards and away from each other, thereby insuring accurate registering of, the indicator operating over the dial.

A stillfur-ther object of the invention is to provide means for converting reciprocatory movement of the rack bar of the instrument into rotary movement in such a way as to insure unlimited registering 'of the indicator. 9 p

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts'a-nd in the details of construction hereinafter de-. scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, maybe made within the scope of what is claimed, without departing fromthe spirit of the invention. a y

' Referring to the drawings: Figure lis an elevational view disclosing calipers constructed in accordance with the present invention.

Figure 2 is' a side elevational view thereof.

Figure 3 is an enlarged detail view of one of the legmembers of the caliper being removed.

Figure 4- is a sectionalview taken on line l4: of Figure 3.

Figure 5 is a sectional view taken on line 55 of Figure 3.

Figure 6 is an enlarged detail view disclosing a modified form of the invention.

Figure 7 is a sectional view taken on line 77 of Figure 6.

Referring to the drawings in detail, the preferred embodiment of the invention includes leg members 5 which are formed With heads 6 and 7- at their upper ends, the heads beingcircular in formation, which are fitted within the sectional housing 8 which 1s cut awayto receive the heads, as clearly shown by Flgure 5 of the drawings.

The housing 8 is formed with openings to accommodate the bolts 9 that extend through I the sections of the housing and secure the sections together, the bolts 9 also passing through the spacing member 10 which is disposed between the sections of the housing, and between the heads 6- and 7. This member 10 is cut away as at 11 to provide a passageway for the movable member 12' which is of a-width to closely fit within the walls of the cut out portion, but at the same time to allow the member 12 to move vertically therein. The cut out portion 11 has a lower elongated cut out portion 13 that accommodates theextension 14 formed integral with the member 12 and depending therefrom. An elongated opening 15 is formed in the member 12 and is designed to accommodate; the pins 16 that extend in-- wardly from the heads of theleg members 5 so that upon movement of the leg members the member 12 will be moved longitudinally of the cut out portion 11. j

An elongated opening 17 is formed in the eXtension 14, one wall of the elongated opening. being provided with teeth 18 that mesh with the pinion 19 carried on the shaft 20 which shaft carries an. indicating hand 21 so thatas the member 12 moves within the out outportion 11, movement will be imparted to the pinion 19 through the teeth 18 to the 1 end that the indicator will move over the dial 21 formed on onesurface of the housing 8. l/Vhile I have shown and described a single hand as operating over the dial, it is to be understood that suitable gearing such as shown in my copending application filed July 16, 1923, may be employed for operating a plurality of hands without departing from the spirit of the invention.

The pins 16 are secured to the heads 6 and 7 andare arranged in such relation to the shaft 20 and the points 6 and 7 of the leg members 5 so as to insure a true and accurate movement of the indicator in relation to points 6 and 7 through the member 12 and associated parts. In the form of the invention as illustrated by Figures 6 and 7 of the drawings, the disk-like member 25 which is positioned between the heads 26 and 27 of the leg members is provided with elongatedopenings 28 and 29, which openings accommodate the pins 30 and 31 car- --ried at the lower ends of the bars 32 which are pivotally supported on the pin 33 carried by the heads 26 and 27 so that as the leg members are moved towards and away from each other, the heads will be rotated transmitting movement to the pins.

The upper ends of the bars 32 are connected by means of the shaftfi l that-carries the rack bar 35 which in turn cooperates with the pinion 36 that transmits rotary members having heads, a spacing member between the heads, said spacing member having cut out portions, a dial forming a part of the instrument, an indicating hand operating over the dial, and means movable in the cut out portions of the spacing member for rotating the indicating hand when the leg members are moved.

2. A measuring instrument including leg members having heads, a spacing member disposed between the heads, said spacing member having cut out portions, a vertically movable member in the cut out portions of the spacing member, said vertically movable member having an elongated opening, pins carried by the heads and movable in the elongated opening to cause the movable member to operate when the leg members are moved, an indicating hand, and means controlled by the movement of the movable member for operating said hand.

3. A measuring instrument including leg members having heads, a spacing member between the heads, said spacing member having a cut out portion, a movable member within the cut-out portion having a horizon-1 tally disposed" elongated opening, pins extending from the heads and disposed in the elongated opening, to cause the movable member to move vertically when the leg members are moved, an indicating hand, and means associated with the movable memberfor transmitting movement to the indicating hand when the leg members are moved.

4. A measuring instrument including leg members having heads, a spacing member disposed between the heads and having a cut out portion formed with a lower cut out portion, a movable member having an extension operating in the lower cut out portion, means for transmitting movement of the leg members to the movable member, an indicating hand, and means for transmitting movement of the movable member to the indicating hand.

5. A measuring instrument including leg members, a spacing member disposed between the upper ends of the leg members, a housing for housing the upper ends of the leg members, a vertically movable member disposed between the leg members, a shaft extending through the upper ends of the leg members and through the housing, an indicating hand on the shaft, and means operating between the leg members for rotating the, shaft to move the indicating hand when the leg members are moved.

6. A measuring instrument including leg members, a spacing member disposed between the .upper ends of the leg members, said spacing member having a. cut out portion formed with a lower elongated cut out portion, a vertically movable member disposed in the out out portion and having an extension operating in the lower elongated cut out portion, said vertically movable member having a horizontally disposed elongated .opening, the extension of the vertically movable member being formed with an elongated opening, one wall of the last mentioned elongated opening being formed with teeth, a shaft for connecting the upper ends of the leg members, a pinion on the shaft cooperating with the teeth, pins extending from the leg members and operating in the horizontally disposed opening of the movable member, to operate the movable member when the leg members are moved, and an indicatinghand on one end of the shaft adapted to be rotated by the movement of the movable member.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two witnesses:

J AMTE'S G. WILLIAMSON. Witnesses:

G. 0. Norm, R. A. MGDONALD. 

